However, here are some variations you might see:
* Fo sho
* Fo shizzle (more playful, sometimes used ironically)
* Fo' sho (using an apostrophe for a more informal feel)
* For shizzle (similar to "fo shizzle")
* For surez (adding an "z" for emphasis)
* For reals (a more direct alternative to "for sure")
Remember, the most common slang spelling is "fo sho", and the others are less frequent and can be considered more informal.